Bulldozer.



PATENTED 001'. s, 1903.

No. 740,421. 1 J. s. GOLDBERG.

'BULLDOZER. APPLIOATION FILED NOV. 17, 1902. H0 MODEL. 8 SHBETSSHBET L.

Inventor; hn 5.Gpldhar g PATENTED 001'; 6, 1903.

J. 's. GOLDBERG. I

- -BUI -LDOZER. APPLIUATIOI lILBD HOV. 17- 1902.

8 SHEETS-SHEET 3.

NO MODEL.

YWiLHBSSEB No. 740,421. I PATENTfi D OCT. 1903.-

J. s. GOLDBERG,

BULLDOZER. APPLIGATION FILED NOV, 17. 1902.

no moan. e sums-5mm 5.

WiTnE 5525:

THE wumslnwcns co mum mo m n01 No. 740,421. "F I Patented October 6, 1903.

U IT D STATES PATENT OFFICE.

JOHN S. GOLDBERG, OF CHICAGO, ILLINOIS, ASSIGNOR- TO THE STROMBERG- CARLSON TELEPHONE MANUFAOTURING COMPANY, OF CHICAGO, IL-LI- NOIS, A CORPORATION OF NEW YORK.

BU LL D O ZER.

SPECIFICATION forming part of Letters Patent No. 740,421, dated October 6, 1903.

Application filed November 17, 1902. derial No. 131,7l1. (No model.) I

To ctZZ whom it may 06??? are engaged by a pair of bending-jaws car- Be it known that L JpHN S. GOLDBERG, a ried upon a reciprocating cross-head. These citizen of the United States, residing at Chijaws force the ends of the bar around the die cago, in the county of Cook and State of Illi-' into the desired U shape. As the steel used nois, have invent-ed a certain new and useful for permanent magnets has considerable Improvement in Bulldozers, of which the folspring,I find it desirable to press the two lowing is a full, clear, concise, and exact deends closer together than is desired in the scription, reference being had to the accom finished magnet, and when the pressure is repanying drawings, forming a part of this moved they spring out into the proper posi- 1o specification. Lion. Means are. further provided to auto- My invention relates to automatic forming matically pick up the finished magnets from machinery, and more particularly to thatclass the die upon the retraction of the bendingof machinery commonly known as bulljaws and to carry the same to any convenient dozers. receptacle or to drop them in a heap at a de- 15 In various manufacturing industriesit is sired point. frequently desirable to shape or form certain. My invention will be best understood by parts of a manufactured product outof a bar reference to the accompanying drawings, or sheet of metal which the market furnishes illustrating the preferred embodiment therein straight lengths. In general myinvention of, in which r g 20 contemplates the provision of a machine Figure l-is a plan view; Fig.2, a side elewhich will automatically transform such, vation. Fig. 3is an enlarged plan view show- I blank bar or plate into pieces of the do ing details of construction. Figs. 4, 5, 6, and sired conformation. While machines" in- 7 are partial sections taken, respectively, on tended for such Work have been common, lines 4 4, 5 5, 6 6, and 7 70f Fig. 3'and clearly 25 they have frequentlygiven trouble onaccount illustrating part of the cutting and guiding of their complication or because of weakness mechanism. Fig. 8 is a sectional view'taken of various parts, unavoidable with such ma-- online 8 8 of Fig. 3. Fig. 9 is a sectional chines as hitherto constructed. view taken on line 9 Qjof Fig. 3. Figs. 10,

Prominent objects of my'invention. havei ll, 12, and 13 areviews illustrating the con- 0 been to provide a machine which on account;' itruction and operation of a preferred mechof its simplicity and openness shall be 'free anism for lifting cut blanks into position to from inherent weakness and to provide a 'be operated upon by the forming mechanism. machine which shall he durable, efficient, re- I Figs. 14,15, l6, l7, and 18 are views showing liable, easy of operation, and generally satisthe operation of a preferred device for con- 35 factory. veying the formed magnets from the die.

\Vhile my invention may be applied to a In accordance with myinvention I provide large class of machines used for forming or a frame 1, havinga pair of slides 2 2, adapted bending blank metal, I shall particularly deto permit the reciprocation of the cross-head scribe an embodiment thereof peculiarly 3. This cross-head is operated by apair of 0 adapted for bending U-shapedmagncts, such connecting-rods 4 4, connected with crankas are used for the permanent magnets in pinsonthegears5 5, whicharedriven through magneto-generators usedin telephone prac i theagencyof pinions66and the tightmate'iof tice. In this preferredembodiment 0f myinthe loose pulley 8, all of which rotating mechventiou I provide upon the frame of the ma- 'anism is mounted in suitable frames 9'9; se-

45 chine a (lie conforming somewhat roughly to cured to the frame of the machine. To the the inside of the bend of the U. Means are other end of the frame 1 is secured a plate 10, provided for cutting proper lengths of the in which is inserted the die 11, about which blank steel bar and for carrying the cut the blanks are to be bent. This die has a blanks .to a point opposite the aforementioned shoulder 12 to prevent the bars from dropping 5o die where the two projectingends of the blank down upon the plate 10. 10o

A trough 13, through which the blank bar 14 is fed into the machine, extends outwardly from one side of the plate and inwardly to the point at which the blanks are cut off by the shear 15, which is carried by a table 16, secured to the reciprocating crosshead. It will be seen that the end 17 of the trough forms one of the two shears necessary for the cutting operation. A projecting ledge 18 extends from the plate and forms a bed upon which may rest the cut blanks 19. When the machine is running, an operator pushes the blank bar in through the trough until the end of the bar strikes the stop 20, which is placed so as to properly regulate the length of the cut blanks. The shear then comes forward and, in connection with its companion 17, shears off the proper length of bar to form the finished magnet. The shears leave the cut blank on theledge 18 in the position shown in Fig. 3.

While I have shown means for automatically cutting off properlengths of material to form the cut blanks, it will be apparent that such blanks might have been previouslycnt and then put into the machine by hand or reaches the back end of its stroke.

feeding mechanism.

As best shown in Fig. 8, a notch 21 is cut in the ledge, which permits the catch of the lifting mechanism to come down and pick up the blank.

Referring more particularly to Figs. 10, 11, 12, and 13, it will be seen that the plate 10 is provided with an extension 22, adapted to support the upright column 23 of the lifting device. Near its upper end this column carries a block 24, which provides a slide for the reciprocating lifting-rod 25. A lever 26 is actuated by a rod 27, whose farther end rides in a hole 28 in a bar 29, projecting upwardly from the cross-head. When the cross-head is near the back end of its stroke, this bar engages the lock-nuts 30 on the rod 27, thereby pulling this lever backward against the tension of the spring 31 until the cross-head It willbe seen that as this rod is retracted the slotted end 32 of the lever will be forced downward with the connected lifting-rod 25. The lower end of the lifting-rod is provided with a spring-catch 33, having a notch34, adapted to fit the cut blank resting upon the ledge 18. The front and lower corner of this catch is beveled, so that as the lifting-rod forces it downward the catch will slip back and around the blank, as shown in Fig. 12, until the rod reaches the lower end of its stroke, when the catch will spring back into its normal position, thus engaging the cut blank, as shown in Fig. 13.

7 It will be seen that the front and lower part of the lifting-rod is provided with a sliding way adapted to accommodate the sliding detent 35, which is normally held down by a spring 36, set in a recess of the lifting-rod and there retained by a cover-plate 37, which in Fig. 11 has been removed to more clearly show the spring. Normally the lower end of this detent comes down about as far as the lower edge of the notch 34, as shown in Fig. 11; but as the lifting-rod comes down to pick up the blank this detent strikes the top of the blank and is forced upward against the pressure of the spring 36, thus securely holding the blank while the lifting-rod moves upward into its normal position, due to the forward motion of the cross'head 3, which allows the rod 27 to come forward. The blank is thus carried upward until its lower edge is level with the shoulder 12 on the die 11, when the liftingrod stops.

Upon the table 16 are pivoted two bendingjaws 38 38, having a limited turning motion about the studs 39 39. Each jaw is provided with a forming-roller 40 and a spring 41, adapted to center a blank in case it has slipped to one side. A spring 41 presses these jaws outward against the stops 42 42. As the crosshead comes forward the rollers 40 4O strike the blank on either side of the die 11 and carry it from the catch of the lifting-rod over against one side of the die and then press the two ends forward, thus forming a U-shaped piece. It will be seen that the forwardly-projecting ends of the. bending-jaws are beveled OK at 43 43, and as these parts come forward they are engaged by the pins 44 44 in the plate 10 and the jaws pressed inward. This inward motion is imparted to the rollers just after they pass the center of the die 11, thus causing the ends of the U to be bent inward, as shown in Fig. 1. As the cross-head recedes and the pressure of the rollers is removed the formed magnet springs out into shape, the two limbs 45 45 becoming parallel, as shown in Fig. 14. When the jaws are retracted, there is often. a tendency for the rollers to pull the formed magnet back 01f the die. This is prevented by the detent 35, which drops down as soon as the blank has been carried from the lifter by the impact of the bending-jaws. Its position is well shown in Fig. 10, where it will be seen that the metal of the magnet fits snugly into the space between the die and the detent.

It will be apparent that if the formed mag-' nets are removed from the die and the blank rod fed in through the trough the machine will indefinitely repeat the operations above described. Each time the cross-head comes forward the shears will cut off a length of the is provided at 48 and a spring 49 to hold the ICC ' 16, where the limbs are shown in section just jaws together. A stop 50 is, also provided, which limits the closure of the jaws to a po- 53, adapted for engagement with one end of a rod 54, whose other end is provided with a pair of adjustable lock-nuts 55 and which is adapted to slide through the eye of an eye:

.bolt 56, screwed into the side of the crosshead 3. A collar is secured to the rod at 57, and a coiled spring 58 is interposed between theeye of the eyebolt and this collar. In the position shown in Fig. 1 this spring is under compression, which forces the rod forward, thus tending to turn the shaft 51, so as to press the lowerjaw 47 down upon the plate 10. The lower jaw has such thickness that its upper side is only slightly higher above the plate 10 than the shoulder 12 of the die 11, and it should be further noticed that this lower jaw -is beveled off at the corners 59 59. When the cross-head and its associated bending mechanismisin, its forward position, thejaws'of the tongs are in sucha position, as best shown in Fig. 1, that as the two limbs 45 45 are bent around the die they willstrike' the beveled corners of the lower jaw,and thus be guided in between the jaws of the tongs, which'open' slightly to accommodate the magnet and at the same time gripit firmly on account of the pressure of the spring 49. The operation of the jaws during the reception of the limbs of the magnet is well shown in Fig.

. as they strike the beveled'corners and where leased by the bending mechanism.

the direction of their motion is indicated by.

the arrows 60, and in Fig. 17, where the limbs are shown after they, have been re- \Vhen the cross-head reaches the back end ,of, its stroke, the eye of the eyebolt engages the lock-nuts 55 and imparts sufficient motion to the rod 54: to turn the shaft 51 and the asso-' ciated tongs up into the position shown in Figs. 3 and18. A stop. 61 is cast upon the plate 10 in such position that when the tongs.

reach this upper position shown the projecting arm 62 of the upper jaw will strike the stop, thus effectively openingthe tongs and permitting the formed magnet to drop to the floor at the front end of the machine. As the crossrhead again comes forward the tongs are brought down to the plate 10 to receive another formed magnet.

While I have particularly shown and described but one embodiment of my invention, it will be apparent to those skilled in the art that many changes may be made without departing from the spirit of my invention, and

I do not, therefore, wish to limit myself to the precise mechanism disclosed; but,

Having described my invention, I claim ,as new anddesire to secure by Letters Patent 1.,In a bulldozer, the combinationwith means'for outtingoif lengths from ablank bar, of a die rigidly mounted upon the frame of the machine, a reciprocating cross-head, bending-jaws carried by said cross-head, a

sliding lifting-rod, a spring-catch, and means associated with said cross-head for effecting the movement of said liftingrod, substantially as described.

2. In a bulldozer, the combinationwith means for cutting off lehgths from a blank bar, of a die rigidly mounted upon the frame of the machine, a reciprocating cross-head, bending-jaws carried by said cross-head, a sliding lifting-rod, a. spring-catch, a detent carried upon said lifting-rod, and means as sociated ,with said cross-head for efiecting the movement of said lifting-rod, substantially as described. 7 V

3. In a bulldozer, the combination with means for cutting off lengths from a blank bar, of means for conveying said out lengths to a forming-die, means for bending said out lengths into a desired shape, and gripping means for receiving and conveying said shaped lengths from said forming-die, substantially as described.

4:. In a bulldozer, the combination with. I

means ,for cutting off lengths from a blank bar, of means for bending said out lengths into a desired shape, and gripping means for receiving and conveying said shaped lengths from the said bending means, substantially as described.

5. In a bulldozer, the combination with means for bending cut lengths of a blank bar into a desired shape, of gripping means for receiving and conveying saidv shaped lengths from said bending means, substantially as described. V V

6. In a bulldozer, the combination with means for bending cut lengths of a blank bar into a desired shape, of a'pair of tongs for conveying said shaped lengths from said bending means, substantially as described.

7. In a bulldozer, the combination witha die rigidly mounted upon the frame of the ma chine, of a reciprocating cross-head, bending mechanism carried upon said cross-head, wherebycut lengths of a blank bar are bent into a desired shape, gripping means for receiving and conveying said shaped lengths from said die, and mechanism associated with said cross-head for releasing said gripping means, substantially as described.

8. In a bulldozer,the combination with a die rigidly mounted upon the frame of the ma-' mechanism associated with said cross-head for operating said conyeying means,snbstantially as described.

9; In a bulldozer,the combination with a die rigidly mounted upon the frameofthemachine, of a reciprocating cross-head, bending mechanism carried upon said cross-head whereby cut lengths of a blank bar are bent into a desired shape, a pair of tongs for conveying said shaped lengths from said die, a rotatable shaft carrying said pair of tongs, means associated with said cross-head for causing rotation of said shaft, and means for causing the opening of said tongs to dislodge such shaped lengths, substantially as described. a

10. In a bulldozer, the combination with a pair of shears for cutting oif lengths from a blank bar, of means for bending said' out lengths into a desired shape, and gripping means for receiving and conveying said shaped lengths from said bending means, substantially as described.

11. In a bulldozer, the combination with a shear rigidly secured to the frame of the machine, of a second shear having a reciprocating motion, whereby suitable lengths of a blank bar are cut ofl means for bending said out lengths into the desired shape, and gripping means for conveying said shaped lengths from said bending means, substantially as described.

12. In a bulldozer, the combination with means for cutting off lengths from a blank bar,'of a die rigidly mounted upon the frame of the machine, movable bending-jaws whereby said cut blanks are cut into a desired shape, and gripping means forconveying said shaped lengths from said bending means, substantially as described.

13. In a bulldozer, the combination with means for cutting off lengths from a blank bar, of a die rigidly mounted upon the frame of the-machine, areciprocating cross-bead,

bending-jaws carried by said cross-head, and gripping means for conveying said shaped lengths from said bending means, substantially as described.

14. In a bulldozer, the combination with means for cutting 01f lengths from a blank bar, of a die rigidly mounted upon the frame of the machine, a reciprocating cross-head, bending-jaws pivotally carried by said crosshead, and gripping means for conveying said shaped lengths from said bending means, substantially as described.

15. In a bulldozer, the combination with means for cutting off lengths from a blank bar, of a die rigidly mounted upon the frame of the machine, a reciprocating cross-head, bending-jaws pivotally carried by said crosshead, means for controlling the turning motion of said jaws, and gripping means for conveying said shaped lengths from said bending means, substantially as described.

16. In a bulldozer, the combination with means for cutting off lengths from a blank bar, of a die rigidly mounted upon the frame of. the machine, a reciprocating cross-head,

bending-jaws pivotally carried by the said cross-head, beveled corners upon said jaws, pins rigidly secured to the frame of the machinein such position as to engage said beveled corners, and'gripping means for conveying said shaped lengths from said bending means, substantially as described.

17. In a bulldozer, the combination with means for cutting off lengths from a blank bar, of a die rigidly mounted upon the frame of the machine, a reciprocating cross-head, bending-jaws pivotally carried by said crosshead, forming-rollers mounted upon said jaws, means for eifecting a turning of said jaws, and gripping means for conveying said shaped lengths from said bending means, substantially as described.

18. In a bulldozer, the combination with means for cutting off lengths from a blank bar, of a die rigidly mounted upon the frame of the machine, a reciprocating cross-head, bending-jaws pivotally carried by said crosshead, forming-rollers mounted upon said jaws, beveled corners upon said jaws, pins rigidly secured to the frame of the machine in such position as to engage said beveled corners to efiect turning of said jaws, and gripping means for conveying said shaped lengths from said bending means, substantially as described.

19. In a bulldozer, the combination with a die rigidly mounted upon the frame of the machine, of a shear rigidly mounted upon the frame of the machine, a reciprocating crosshead, a second shear mounted upon said crosshead and adapted in conjunction with said first shear to cut off lengths from a blank bar,

bending-jaws pivotally carried by said crosshead, forming-rollers mounted upon said jaws,,beveled corners upon said jaws, pins rigidly secured to the frame of the machine in such position'as to engage the said beveled corners to effect turning of said jaws, and

ICC

gripping means for conveying said shaped lengths from said bending means, substan tially as described.

20. In a bulldozer, the combination with means for cutting off lengths from a blank bar, of a die rigidly mounted upon the frame of the machine, a reciprocating cross-head, bending-jaws carried by said cross-head, mechanism operated by said crosshead, whereby said out lengths are placed in position to be acted upon by said-die and said jaws, and gripping means for'conveying said shaped lengths from said bending means, substantially as described.

21. In a bulldozer, the combination with means for cutting 0% lengths from a blank bar, of a die rigidly mounted upon the frame of the machine, a reciprocating cross-head, bending-jaws carried by said cross-head, a sliding lifting-rod, a spring-catch, means associated with said cross-head for effecting the movement of said lifting-rod, and means for conveying said shaped lengths from said bending means, substantially as described.

'22. In a bulldozer, the-combination with means for cutting ofi lengths from a blank frame of the machine with a reciprocating sliding lifting-rod, a spring-catch, a detent carried upon said lifting-rod, means associated with said cross-head for edecting the movement of said lifting-rod, and means for conveying said shaped lengths from said bending means, substantially as described.

23. In a bulldozer, the. combination with a die rigidly mounted upon the frame of themachine, of a shear rigidly mounted upon the frame of the machine with a reciprocating cross-head, a second shear mounted upon said cross-head and adapted in conjunction with said first shear to shear off lengths from a blank bar, bending-jaws pivotally carried by said cross head, forming rollers mounted upon said jaws, means for effecting a turu ing of. said jaws, and mechanism for lifting and holding said cut lengths in position to be acted upon by said die and said jaws, substantially as described.

24. In a bulldozer, the combination with a die rigidly mounted upon the frame of the machine, of a shear rigidly mounted upon the frame of the machine, a reciprocating crosshead, a second shear mounted upon said cross-head and adapted in conjunction with.

said first shear to shear 0E lengths from a blank bar, bending-jaws pivotally carried by said cross-head,forming-rollers mounted upon said jaws, means for effecting the turning of said jaws,a slidinglifting-rod,a spring-catch, and means associated with said cross-head for effecting a movement of said lifting-rod, substantially as described.

25., In a bulldozer, the combination with a die rigidly mounted upon the frame of the machine, of a shear rigidly mounted upon the frame of the machine, a reciprocating crosshead,a second shear mounted upon said crosshead andadaptedin conjunetionwithsaid first shear to shear 0E lengths from a blank bar, bending-jaws pivotally carried by said crosshead,forming-rollers mounted upon said jaws, means for edecting the turning of said jaws, a sliding lifting-rod, a spring-catch, a detent carried upon said lifting-rod, and means associated with said cross-head for effecting a movement of said lifting-rod, substantially as described.

26. In a bulldozer, the combination witha die rigidly mounted upon the frame of the machine, of a shear rigidly mounted upon the cross-head,a second shear mounted upon said cross-head and adapted in conjunction with said first shear to shear 0d lengths from a blank bar, bending-jaws pivotally carried by said crosshead, forming-rollers mounted upon said jaws, means for elfecting a turning of said jaws, means whereby said out lengths are placed in position to be acted upon by said die and said jaws, and gripping mechanism for conveying shaped lengths from said die, substantially as described.

27. In a bulldozer, the combination with a.

die rigidly mounted upon the frame of the machine, of a shear rigidly mounted upon the frame of the machine, a reciprocating crosshead,a second shear mounted upon said crosshead and adapted in conjunction with said first shear to shear 0d lengths from a blank bar, bending-jaws pivotally carried by said cross-head, forming-rollers mounted upon said jaws, means for edectiug the turning of said jaws, a sliding lifting-rod,aspring-catch, means associated with said cross-head for offecting a movement of said lifting-rod, and means for conveying shaped lengths from said die, substantially as described.

.ing of saidjaws, a sliding lifting-rod, a springcatch, a detent carried upon said lifting-rod, means associated with said cross-head for effecting a movement of said lifting-rod, and means for conveying shaped lengths from said die, substantially as described.

29. In a bulldozer, the combination with a die rigidly mounted upon the frame of the machine; of a shear rigidly mounted upon the frame of the machine, a reciprocating crosshead, a second shear mounted upon said cross-head and adapted in conjunction with said first shear to shear off lengths from a blank bar, bending-jaws pivotally carried by said cross head, formingrollers mounted upon said jaws, means for-effecting the turning of said jaws whereby said out lengths are bent into a substantially U shape, a sliding lifting-rod, a spring-catch, and means associated with said cross-head for effecting the movement of said liftingrod, substantially as described.

30. In a bulldozer, the combination with a die rigidly mounted upon the frame of the machine, of a shear rigidly mounted upon the frame of the machine, a reciprocating crosshead, a second shear mounted upon said cross-head and adapted in conjunction with said first shear to shear off lengths from a blank bar, bending-jaws pivotally carried by said cross-head, forming-rollers mounted upon said jaws, means for effecting the turning of said jaws whereby said out lengths are bent into a substantially U shape, a sliding IIO blank bar, bending-jaws pivotally carried by said cross head, forming-rollers mounted upon said jaws, means for effecting the turning of said jaws, whereby said out lengths are bent intoa substantially U shape, a sliding lifting-rod, a spring-catch, means associated with said cross-head for eifecting the movement of said lifting-rod, and means for conveying said U-shaped lengths from said die, substantially as described.

32. In a bulldozer, the combination with a die rigidly mounted upon the frame of the machine, of a shear rigidly mounted upon the frame of the machine, a reciprocating crosshead, a second shear mounted upon said crosshead and adapted in conjunction with said first shear to shear off lengths from the blank bar, bending-jaws pivotally carried by said cross-head, forming-rollers mounted upon said jaws, means for effecting the turning of said jaws, whereby said out lengths are bent into a substantially U shape, a sliding lifting-rod, aspring-catch, means associated with said cross-head for effecting the movement of said lifting-rod, a detent carried upon said lifting-rod,'and means for conveying said U- shaped lengths from said die, substantially as described.

33. In a bulldozer, the combination with means for cutting 01? lengths from a blank bar, of a die rigidly mounted upon the frame of the machine, a reciprocating cross-head,

bending-jaws carried by said cross-head, a mechanism operated by said cross-head for lifting and holding said cut lengths in position' to be acted upon by said die and said jaws, substantially as described.

34. In a'bulldozer, the'combination with means for, cuttingo ff lengths from a blank bar, of a die rigidly mounted upon the frame of the machine, a reciprocating cross-head, bending-jaws carried by said cross-head, a vertical sliding rod, mechanism associated with said rod for gripping said out lengths, and means for raising said rod whereby the cut lengths are placed in position to be acted upon by said die and saidjaws, substantially as described.

35. In a bulldozer, the combination with means for cutting off lengths from a blank bar, of'a die mounted upon the frame of the machine, a reciprocating cross-head, bent jaws carried by said cross-head, means for gripping said out lengths, and means for raising said lengths into position to be acted upon by said die and said jaws, substantially as described.

In witness whereof I hereunto subscribe my name this 13th day of November, A. D. 1902.

JOHN s. GOLDBERG.

Witnesses:

HARVEY L. HANsoN, CHARLES J. SCHMIDT. 

